实现“docker keepalived虚拟IP host模式”教程

流程图

flowchart TD
    A(准备环境) --> B(安装Docker)
    B --> C(创建Docker网络)
    C --> D(拉取keepalived镜像)
    D --> E(配置keepalived)

状态图

stateDiagram
    开始 --> 准备环境
    准备环境 --> 安装Docker
    安装Docker --> 创建Docker网络
    创建Docker网络 --> 拉取keepalived镜像
    拉取keepalived镜像 --> 配置keepalived

教程步骤

1. 准备环境

在所有参与节点上安装Docker，确保网络连接正常。

2. 安装Docker

使用以下命令安装Docker：

sudo apt-get update
sudo apt-get install docker-ce

3. 创建Docker网络

创建一个Docker网络，用于容器之间通信：

docker network create --driver bridge mynetwork

4. 拉取keepalived镜像

使用以下命令拉取keepalived镜像：

docker pull osixia/keepalived:2.0.19

5. 配置keepalived

创建一个配置文件keepalived.cfg，内容如下：

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 101
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
       192.168.1.10
    }
}

virtual_ipaddress {
    192.168.1.10
}

然后运行以下命令启动keepalived容器：

docker run -d --name keepalived \
  --cap-add=NET_ADMIN \
  --cap-add=NET_BROADCAST \
  --cap-add=NET_RAW \
  --net=mynetwork \
  -e KEEPALIVED_INTERFACE=eth0 \
  -e KEEPALIVED_VIRTUAL_IPS=192.168.1.10 \
  -e KEEPALIVED_STATE=MASTER \
  -v /path/to/keepalived.cfg:/etc/keepalived/keepalived.cfg \
  osixia/keepalived:2.0.19

结尾

恭喜你，现在已经成功实现了“docker keepalived虚拟IP host模式”。希望这篇教程对你有所帮助，如果有任何问题请随时向我提问。继续努力，享受编程的乐趣！